slicer outputs without an intermediary file

[jamesb93]

Hello,

I thought that it might be useful if the CLI had a way of passing its output directly to stdout, rather than into an intermediate file. That way it could be used directly on the command line without having to use a file which then has to be cleaned up, and also would make embedding it in other applications easier.

For example:

If you still wanted an intermediary file:

fluid-noveltyslice -source file.wav -indices stdout >> myslices

but you could also unlock some cool inline scripting like grabbing the first six slices only

fluid-noveltyslice -source file.wav -indices stdout | xargs echo | cut -c 1-6

Again, available to PR this sort of thing if its within scope and if I had some direction :)

[jamesb93]

Just had a quick dig in the code, and added another condition in the control flow of the the write() method:

else if (mPath == "stdout")
{
  FluidTensorView<const float, 2> view{mData.data(), 0, numChans(),
                                  numFrames()};
  std::cout << view.transpose();
}

This seems (at least to my naive view) a pretty decent output and will always be in line with what one would expect from the CSV too. I get comma separated values in the output which I can then pipe around.

I don't mind passing stdout to -indices, actually it makes sense in a way to have lots of different things you can pass to this flag, maybe .JSON in the future :) but the only issue is other things are emitted into stdout also, like the percentage. This could be solved with something like what is proposed in #10